BU97530KVT Datasheet, PDF (1/59 Pages) Rohm – Built-in OSC circuit

LCD Segment Drivers
Multi-function LCD Segment Drivers
BU97530KVT
MAX 445 Segment(89segx5COM)
General Description
The BU97530KVT is 1/5, 1/4, 1/3 or 1/1 duty
general-purpose LCD driver that can be used for
frequency display in electronic tuners under the
control of a microcontroller. The BU97530KVT can
drive up to 445 LCD Segments directly. The
BU97530KVT can also control up to 9
general-purpose output ports.
These products also incorporate a key scan circuit
that accepts input from up to 30 keys to reduce
printed circuit board wring.
Features
„ Key input function for up to 30 keys (A key scan is
performed only when a key is pressed.)
„ Either 1/5, 1/4, 1/3 or 1/1 duty (static) can be
selected with the serial control data.
1/5 duty drive: Up to 445 segments can be driven
1/4 duty drive: Up to 360 segments can be driven
1/3 duty drive: Up to 270 segments can be driven
1/1 duty drive: Up to 90 segments can be driven
„ Serial data control of frame frequency for common
and segment output waveforms.
„ Serial data control of switching between the
segment output port , PWM output port and
general-purpose output port functions.(Max 9
ports)
„ Built-in OSC circuit
„ Integrated Power-on Reset circuit
„ No external component
„ Low power consumption design
„ Supports Line and Frame Inversion
Key Specifications
„ Supply Voltage Range:
+2.7V to +6.0V
„ Operating Temperature Range:
-40°C to +85°C
„ Max Segments:
445 Segments
„ Display Duty:
1/1,1/3,1/4,1/5 selectable
„ Bias:
1/2, 1/3 selectable
„ Interface:
3wire serial interface
Packages
TQFP100V
W(Typ.)×D(Typ.)×H(Max.)
TQFP100V
16.00mm x 16.00mm x 1.20mm
Applications
„ Car audio, Home electrical appliance,
Meter equipment etc.
Typical Application Circuit
Key Matrix
+5V
(Note1)
From
Control
To Control
KS1/S79
|
KS6/S84
VDD
KI1/S85
|
COM1
KI5/S89 COM2
COM3
COM4
COM5/S78
S1/P1/G1
SCE
SCL
SDI
SDO
S9/P9/G9
S10
S77
OSC/S90
(P1/G1) _{(General purpose/PWM ports)}
(P9/G9) (For use control of backlight)
LCD Panel
(Up to 445
Segments)
(Note1) Insert capacitors between VDD and VSS C≥0.1uF
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
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02.Mar.2015 Rev.003